Seal between the Exhaust Flap Control Module -J883- and NOx Reservoir or Reduction Catalytic Converter Installed Position.

-- Insert the seal -2- and the angled tab -B- into the notch -A- on the NOx reservoir or reduction catalytic converter -1-.

Fig 1: Inserting Seal -2- And Angled Tab -B- Into The Notch -A

Courtesy of AUDI OF AMERICA, LLC

-- Insert the exhaust flap manifold -- -3- with the retaining tab -C- in the notch -A-.